Oiling system for internal-combustion engines



Jan. 20, 1931. o. J. GROEHN 1,739,384

' OILING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed Feb. 25, 1929 2Shoots-Sheet 1 /Z //a 2 I 4 y A-Hya Jan. 20, 1931. o. J. GROEHN1,789,384

01mm SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed Feb. 25, 1929 2Sheets-Sheet 2 /Z (3 o o o O x I //a 4m INVEN+URI b MEAN W *V N YPatented Jan. 20, 1931 .UNITE'D STATES PATENT OFFICE OTTOJ. GROEHN, OFGBOSSE POIN'I'E PARK, MICHIGAN, ASSIGNORTO HUDSON MOTOR 1 CAR COMPANY,OF DETROIT, MICHIGAN, A CORPORATION OF'MICHIGAN OIIIING SYSTEM FORINTERNAL-COMBUSTION ENGINES Application filed ma 25, was. Serial No.342,421.

This invention relates to an oil tray and sump assembly and moreparticularly to means for circulating the oil in a splash lubricatingsystem for Internal combustion engines andfor conveying the oilsuccessively to a pluralit will be splas ed up evenly at all times tothe several parts to be lubricated, and at the same time the. excess oilsplashed up will be intercepted, and progressively returned to the sump.By these means the amount of Oil mist surrounding the parts of theengine may be controlled andthe undesirable effects ofover-lubricationof the cylinders avoided.

1s lash oiling s stem such as is disclosedv in My invention has todogenerally with a nited States tters PatentNos. 1,241,589 and1,256,754,,granted October 2, .1917, and February 19, 1918, respectivelyto E. M. White, and has for its 0 ject to provide improved means forconveying and controlling the oil splashed up and for effecting an evenlubrication by re ucing turbulence in the sump. j

: "Other objects of the invention will appear from the followingdescription of a preferred embodiment illustrated in the accompanyingdrawings, it being understood, however,

that the particular construction described and shown has been chosen forpurposes of ex emplification merely, and that the invention a Fig. 4 isa sectional is not to'be limited; otherwise than as defined by theclaims hereunto'appendedand as required by the prior art. I p

' Referring now to the drawings Fig; 1 .is a longitudinal sectionthrough the oil tray and sump assembly. I

-F"g. 2 is a transverse sectiontaken substantially on the line 22, Fig.1.

Fig. 3 is a transverse section taken on line 3-3i0f Fig. 1. p q aperspective view of the oil tray, showing the arrangement of the in-.terceptors and oil conveyors.

Fig. 5 is a similar view of the oil sump and the'splash plates mountedtherein.

In Figs. 1 to 3 inclusive the letter A denotes the lowerpartof the crankcase of an internal combustion engine, and the numerals'l and-2designate respectivelyan oil tray of receptacles so that the oil and anoil sump or reservoirsecured, the for mer above the latter, to the openbottom of said crank case to close said open bottom. C

(Fig.2 denotes the crank shaft having Cranks respectively connected withthe severalpistons (not shown) by connecting rods'IO.

The oil tray 1, which is spaced vertically above the bottom of the sump2, has a number of laterally extending depressions 3, 4, 5, 6, 7 and 8which serve as troughs or receptaclesin which the oil collects. .Thedepressions are equal in number tothe cranks B and are so positionedthat the finger 9 carried on the end of each of the connecting rods 10will'splash up oil from meet the receptacles in a manner well understoodin the art.- Alongone side of the'oil tray means are provided to controlthe volume of the oil which is splashed up by the revolving cranks andto limit the area of theoil mist the intercepters 11 and 12 have spaced,

curved, vertical walls, concave toward the receptacle, and are nestedconcentrically, one

within the other, the-intercepter 12 bein'gof greater heightthan theintercepter 11. The inner and smaller intercepter 11 has a plate or'horizontalw'all 11a across its top while the outer and largerintercepter 12 also has a platev ortop horizontal wall 12a, but thelatter is partially cut away centrallythereof so that it will notprevent oil from being directed to all of the parts requiringlubrication. These intercepters'are devised so that the. smallerintercepter 11 will catch the bulk of the oil which is splashed up atsuch an angle that it'will not reach the parts to be lubricated. Thelarger intercepter 12 is designed to supplementt-his action and tointercept the oil carried momentarily by the finger on the crankshaftand thrown off thereafter as it revolves. The intercepters togetherserve to prevent the formation of an oil mist (or drum) which otherwisesurround thecrankshaft and tends to rotate therewith, Bythis means it ispossible'to be reduced ,to a minimum, so that the oil may each of thepairs of intercepters, with the' e ception f-Vt epair a ther mmos r cap:

tacle il onv y s eip fo idedii AS.

illustrated in Fig. 4, each of the conveyors extends longitudinally ofthe tray. substan-i tially the width of each depression,and is closed atthe front endbut-op'en atthe rear end so that theoil which collectstherein will be fedfprogressively to the rear adjoining receptacle. Therear end of each of the conveyors is.extendedtransversely of the tray toform a wall 13a separating the adjoining depressions in order to moreeffectually prevent the oil from returning to the reservoir from.whichit was splashed up, In this manner the oilis splashed up fromthereceptacles, 'collectedby the-conveyors, and progressively passedrearwardlyfrmn onereceptacle to another until i t reach'es the rearmostreceptacle 8. The oil that gathers in the latter receptacle is'splashedthrough an opening 14 in the side wall ofthe tray (see Figs. '3an d l)'by means of which the oil'may be fed back into the oil sump 2.

The main oil reservoirorfsump 2 is positioned beneath the oil tray andhas at one'end an opening 15, c1osed a plug 16, through which' the oilcontained therein may be drained; The pipe 17 ,shown in Figs l and 5, atthe rear end of the sump serves to return the oil from the upperportionspf the crank case above thetray. Positioned transversely acrossthe sump directly in front of this pipe a splashplate '18 is providedand spaced somewhat further forward there is a 'second splash plate 19.These plates extend v substantially across the full width of the sumpwith the exception of narrow spaces at each side thereof, one of whichis indicated at S in Fig 3, and mayals o be provided with notches orvopenings T adjacent the bottom of the sump, They are spaced apartso thatthe outlet 14 from the rearmost receptacle of the oiltray will emptyinto, the oil sump therebetween and from which the oil will passthroughthe spaces S and openings T 'in' an even flow to the main bodyofv the sump.

* These plates are provided to prevent splashing of the oil returned tothe sump from. the upper portions of the crank case through thepipe 1 7andfrom the tray as it is discharged through} the outlet 14. order to.obtain an even lubrication at all times it ,is

important that turbulence in th e oil sump be pumped up therefrom, at aneven rate. The plateslSand' 19 perform an important service inaccomplishing'this result.-

tofore'it has been customary to permanently The oil tray fits into theupper portion of the oil sump, and both the sump and tray are providedwith marginal flanges having holes therethrough to receive bolts 20 bywhich the tray and sump may be demountably secured together, and to theedges of the open bottom of the crank case A. As shown iir'Figs. 1and---2,--a gasket 20 is secured between the flanges of; the oil, trayand 'oilsump. Heresecure the oil tray and oil sump together asby the usev -of rivets or solder, making it impossible to get at the interior ofthe sump to cleanit thoroughly Since it is very desirable to keep boththe tray and sump thoroughly clean inorder to obtain better-lubrication;and to' avoid wear on the parts of Y the engin e,,the readilydemountable'arrangement of the oil tray and oilsump is animportantadvantageofmy-invention.-

Having thus described claim: I Y s v 1. In j an internalcombustiomengine, the combination with the crank shaftand com nectingrods,- of an oil "tray, below said crank shaft having depressionstherein constituting oil receptacles or troughs-from which the.connecting. rods may splash up oil, and a pair :of intercep'torspositioned adjacentone (endof each receptacle, said intercepters beingiconcave toward the receptacle "and being nested one within theother.

2x111 aninternal combustion engine, the combination with the crank shaft{and connecting rods, of an oil tray belowsaid crank my invention, I

' sha fthavingdepressions therein constituting oil receptacles ortroughs from -which-the connecting rods may splash upoil, and a: pair;of

spaced, curved, vertical walls, concave toward the receptacle andconcentrically .aar-

ranged, the inner intercepter-=being of less heightthanthe outer an'dhavinga closedtop,

and the'outer intercepter-havinga top wall '110 which is partially cutaway centrally the eof.

3. In an internal combustion engine, the combination with, the crankshaft and: connecting rods, of anoil tray-belowsaidicrank shaft havingdepressions therein constituting' oil receptaclesor-troughs fromwhichthe connecting rods may splash upoil, andqoilzconveyors forCdUSlllgfllBOlldlO be .fed progressively through said depressions m$1lGGe SS1OIl,

the rear'end of each ofsaid: conveyors being extended transversely ofthetray to-forma vertical 1 wall separating adjoining depressions.

4. In an internalcombustion engine, the

combination with the crank 'shaft and .con-' 1 5 necting rods,'of anoil: tray below said crank shaft having depressions therein constitutingoil receptacles'ortroughs from which theconnecting rods may splash upoil, an. oil reser;

voir beneatlr saidtray, means for; feeding the. 1

oil progressively thro b said depressions in succession, the wall 0 saidtray having an opening through which the oil is finally discharged intosaid reservoir, and s lashplates in said reservoir on either side 0 saidopenmg.

5. In an internal combustion engine, the combination with a crank shaftand connecting rods, of an oil tray having depressions from which theconnecting rods may s lash up oil, and a plurality of intereeptors 0 unequal height adjacent the end of each receptacle, the said interceptorsbeing arranged one behind the other in the order of height.

6. In an internal combustion en 'ne, the combination with a crank shaftan connection rods, of an oil tray below said crank shaft havingdepressions therein constituting oil receptacles from which theconnecting rods may splash up oil, and oil conveyors for causing the oilto be fed progressively through said depressions in succession, saidconveyors a being carried by the tra and having integral end extensionsdispose transversely of the tray between the several troughs.

In testimony whereof I aflix m OTTO J. GltO ature. HN.

